Özet:

Problem Statement: simulation flow using STOAT program to assess variation in settling solids concentration in wastewater from a primary tank of a urban waste water treatment plant. Our case study is based on sensitivity analysis of solids change depending on the flow of wastewaters from a urban wastewater treatment plant. Purpose of Study: In this paper we demonstrate how to use the simulation flow sensitivity analysis within STOAT program to evaluate the effect of variation of the constant, “k” in the equation v= kCh settling on fixed concentration of suspended solids in sewage water from a primary tank of physical-biological step. Methods: We use the STOAT program with input and output data for primary tank and parameters of wastewater. We generated a file for influent data using a sinusoidal model and we accepted defaults STOAT data. After this, we get spreadsheet data for various characteristics of wastewater for 48 hours. These features are data on the: flow, temperature, pH, volatile fatty acids, soluble BOD, COD inert soluble particulate BOD, COD inert particles, volatile solids, volatile solids, ammonia, nitrate and soluble organic nitrogen.To wire the primary tank and effluent fluid of variation of parameters we chose for each run. Playing involve graphical representation of the variation coefficient k depending settling suspended solids and flow regime, depending on speed and coefficient 440Findings and Results: Using sensitivity analysis to see the variation and elimination and other elements such asphosphorus, poly-phosphorus, autotrophic viable and non-viable heterotrophic viable, nonviable, metalhydroxide, metal phosphate, alkalinity, total dissolved solids, nitrates, soluble metals, glycogen, glycogen inbacteria-G viable, unviable glycogen in bacteria-G, G-viable bacteria, viable bacteria-G, PHA-G in bacteria viable,unviable PHA-G in bacteria, dissolved organic carbon, soluble organic nitrogen degraded paticule degradableorganic nitrogen, particulate phosphorus degradable, non-degradable particulate phosphorus, soluble organicphosphate degradable and non-degradable soluble phosphate. Conclusions and Recommendations: Usingsensitivity analysis to see the variation sensitive and accurate graphics wastewater characteristics, while failingthis analysis leads to an almost linear variation graphs, due to the large data.

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